That was a demo channel for the Globalsat trade show (Istanbul) last month that has spilled over, much like the demos on display at the last IBC show at RAI. There is no dedicated programming from a broadcaster, the Super High-Vision content from Japan includes sponsored content from screen manufaturer, Sharp.
OB vehicles toured Europe including the UK, visiting Kew Gardens five weeks ago to install a SHV studio in Cambridge Cottage for the week, recording content in both 4 and 8K.
NHK outlines 4K and 8K channel plans